Cloudflare cannot find the devalue module

[timoanttila]

Describe the bug

I was making changes to a SvelteKit project that had no problems until yesterday. I use Cloudflare for hosting. I got the error below from Cloudflare:

10:02:35.691 | ✨ Success! Uploaded 63 files (45 already uploaded) (1.94 sec)
-- | --
10:02:35.691 |  
10:02:36.270 | ✨ Upload complete!
10:02:40.882 | Success: Assets published!
10:02:41.774 | Error: Failed to publish your Function. Got error: Uncaught Error: No such module "server/devalue".   imported from "server/index.js"

My local repository contains node_modules/devalue, which is used in multiple files within node_modules/@sveltejs/kit/src. There is no issue when using yarn dev or npm run preview locally.

  "devDependencies": {
    "@sveltejs/adapter-cloudflare": "latest", // Same problem with ^6.0.0
    "@tailwindcss/postcss": "^4.0.15",
    "@tuspe/components": "^1.8.0",
    "@types/luxon": "^3.4.2",
    "eslint": "^9.23.0",
    "eslint-config-prettier": "^10.1.1",
    "eslint-plugin-svelte": "^3.3.3",
    "js-cookie": "^3.0.5",
    "postcss": "^8.5.3",
    "prettier": "^3.5.3",
    "tailwind-merge": "^3.0.2",
    "tailwindcss": "^4.0.15",
    "typescript": "^5.8.2"
  },
  "dependencies": {
    "@iconify/svelte": "^4.2.0",
    "@sveltejs/kit": "^2.20.2",
    "@sveltejs/vite-plugin-svelte": "^5.0.3",
    "@zerodevx/svelte-toast": "^0.9.6",
    "luxon": "^3.5.0",
    "svelte": "^5.25.2",
    "svelte-check": "^4.1.5",
    "svelte-preprocess": "^6.0.3",
    "vite": "^6.2.2"
  }

Reproduction

I have a normal SvelteKit installation plus this hooks.ts:

import type {Reroute} from '@sveltejs/kit'

export const reroute: Reroute = ({url}) => {
  const path = url.pathname,
  parts = path.split('/')
  parts.shift()

  if (parts[0] !== 'en') {
    // Example: ['en', 'de'].includes(parts[0])
    return path // No need to reroute
  }

  if (parts.length === 1) {
    return '/' // Redirect /en to /
  }

  // Define your mappings for specific routes
  const exactMappings: Record<string, string> = {
    '/en/news': '/uutiset',
    '/en/games': '/ottelut',
    '/en/games/stats': '/ottelut/tilastot'
  }

  if (exactMappings[path]) {
    return exactMappings[path] // Exact match, perform the reroute
  }

  // Define mappings for routes with a prefix
  const prefixMappings: Record<string, string> = {
    '/en/news': '/uutiset'
  }

  for (const englishPrefix in prefixMappings) {
    if (path.startsWith(englishPrefix)) {
      const finnishPrefix = prefixMappings[englishPrefix]
      const suffix = path.substring(englishPrefix.length)
      return `${finnishPrefix}${suffix}` // Reroute with the correct prefix and suffix
    }
  }
}

My svelte.config.js:

import adapter from '@sveltejs/adapter-cloudflare'
import {vitePreprocess} from '@sveltejs/vite-plugin-svelte'
import {sveltePreprocess} from 'svelte-preprocess'

/** @type {import('@sveltejs/kit').Config} */
const config = {
  compilerOptions: {
    enableSourcemap: false
  },
  preprocess: [vitePreprocess(), sveltePreprocess()],
  kit: {
    adapter: adapter()
  }
}

export default config

System Info

System:
    OS: macOS 15.3.2
    CPU: (8) arm64 Apple M1
    Memory: 70.53 MB / 8.00 GB
    Shell: 5.9 - /bin/zsh
  Binaries:
    Node: 23.9.0 - /usr/local/bin/node
    Yarn: 1.22.22 - /usr/local/bin/yarn
    npm: 10.9.2 - /usr/local/bin/npm
    bun: 1.1.36 - ~/.bun/bin/bun
  Browsers:
    Safari: 18.3.1
  npmPackages:
    @sveltejs/adapter-cloudflare: latest => 1.0.0-next.45 
    @sveltejs/kit: ^2.20.2 => 2.20.2 
    @sveltejs/vite-plugin-svelte: ^5.0.3 => 5.0.3 
    svelte: ^5.25.2 => 5.25.2 
    vite: ^6.2.2 => 6.2.2

Severity

blocking an upgrade

[DeltaLaboratory]

I also have this issue with clsx module, but this issue seems not limited to specific module but any module.

[llama-for3ver]

Same here, from a relatively newly generated sv project.

"devDependencies": {
        "@eslint/compat": "^1.2.5",
        "@eslint/js": "^9.18.0",
        "@playwright/test": "^1.49.1",
        "@sveltejs/adapter-auto": "^4.0.0",
        "@sveltejs/kit": "^2.16.0",
        "@sveltejs/vite-plugin-svelte": "^5.0.0",
        "@tailwindcss/vite": "^4.0.0",
        "@testing-library/jest-dom": "^6.6.3",
        "@testing-library/svelte": "^5.2.4",
        "daisyui": "^5.0.3",
        "eslint": "^9.18.0",
        "eslint-config-prettier": "^10.0.1",
        "eslint-plugin-svelte": "^3.0.0",
        "globals": "^16.0.0",
        "jsdom": "^26.0.0",
        "prettier": "^3.4.2",
        "prettier-plugin-svelte": "^3.3.3",
        "prettier-plugin-tailwindcss": "^0.6.11",
        "svelte": "^5.0.0",
        "svelte-check": "^4.0.0",
        "tailwindcss": "^4.0.0",
        "typescript": "^5.0.0",
        "typescript-eslint": "^8.20.0",
        "vite": "^6.0.0",
        "vitest": "^3.0.0"
    },
    "dependencies": {
        "@inlang/paraglide-sveltekit": "^0.15.5",
        "@lucide/svelte": "^0.483.0",
        "@supabase/ssr": "^0.6.1",
        "@sveltejs/adapter-cloudflare": "^6.0.0",
        "buffer": "^6.0.3",
        "svelte-jsoneditor": "^3.1.0"
    }

[sphfaar]

I temporarily solved downgrading "@sveltejs/adapter-cloudflare" from "^6.0.0" to "^5.1.0" in a new project.

"devDependencies": {
	"@cloudflare/workers-types": "^4.20250320.0",
	"@eslint/compat": "^1.2.7",
	"@eslint/js": "^9.23.0",
	"@sveltejs/adapter-auto": "^5.0.0",
	"@sveltejs/adapter-cloudflare": "^5.1.0", // <--- was ^6.0.0
	"@sveltejs/kit": "^2.20.2",
	"@sveltejs/vite-plugin-svelte": "^5.0.3",
	"@tailwindcss/vite": "^4.0.15",
	"drizzle-kit": "^0.30.5",
	"eslint": "^9.23.0",
	"eslint-config-prettier": "^10.1.1",
	"eslint-plugin-svelte": "^3.3.3",
	"globals": "^16.0.0",
	"prettier": "^3.5.3",
	"prettier-plugin-svelte": "^3.3.3",
	"prettier-plugin-tailwindcss": "^0.6.11",
	"svelte": "^5.25.2",
	"svelte-check": "^4.1.5",
	"tailwindcss": "^4.0.15",
	"typescript": "^5.8.2",
	"typescript-eslint": "^8.27.0",
	"vite": "^6.2.2",
	"wrangler": "^4.3.0"
}

[Tihomir971]

Same problem.
`

13:18:20.176 | ✨ Success! Uploaded 22 files (88 already uploaded) (1.10 sec)
-- | --
13:18:20.176 |  
13:18:20.743 | ✨ Upload complete!
13:18:24.722 | Success: Assets published!
13:18:25.961 | Error: Failed to publish your Function. Got error: Uncaught Error: No such module "server/chunks/clsx".   imported from "server/chunks/index.js"

` I'm using shadcn-svelte util

import { type ClassValue, clsx } from "clsx";
import { twMerge } from "tailwind-merge";

export function cn(...inputs: ClassValue[]) {
	return twMerge(clsx(inputs));
}

[eltigerchino]

Sorry about this. Please revert to @sveltejs/adapter-cloudflare v5.1.0 for now, or follow this workaround, or wait for v6.0.1 to be released.